mysql数据库增删改查

环境
搭建一个mysql源码的数据库
主机192.168.80.100 主机名db
https://blog.youkuaiyun.com/qeeezz11224/article/details/85093094 //地址搭建数据库过程

第一步
进入数据库操作

mysql -uroot -pabc123 //进入数据库

show databases;   //查看所有数据库

create database c01;    //创建数据库c01

 use c01;   //切换数据库

create table stu (name char(16),password int(48));  //创建stu表字段为name,password

show tables;       //查看表

desc stu;   //查看表中结构字段

insert into stu (name,password) values ('张三','123');   //给表stu表添加内容

select * from stu;   //查看表中内容

update stu set password=789 where name='张三'; //将表中的张三用户密码有原来的123改为789

select * from stu;  //查看密码已经修改成功

delete from stu where name='张三';           //删除stu表中张三用户
delete from stu;                           //删除表中所有数据

select * from stu;    //查看表stu会发现表中内容为空

drop table stu;          //删除数据表stu

 drop database c01;        //删除数据库c01

alter table stu rename stu1;   //修改表明为stu1

alter table stu1 add "身份证" int(24)NOT NULL;   //在表stu1中添加身份证字段

alter table stu1 change "身份证" "班级" char(10) NOT NULL;    //将stu1表中的字段身份证改为班级

alter table stu1 drop "密码";  //删除stu1表中的密码字段

到此数据库中的增删改查基本命令完成

root!QAZ2wsx

root@localhost : MYSQL 04:40:05> set PASSWORD=PASSWORD('123456');
Query OK, 0 rows affected, 1 warning (0.01 sec)

Warning (Code 1287): 'SET PASSWORD = PASSWORD('<plaintext_password>')' is deprecated and will be removed in a future release. Please use SET PASSWORD = '<plaintext_password>' instead


update user set authentication_string=password('123456') where user='aml';
Query OK, 1 row affected, 1 warning (0.00 sec)
Rows matched: 1  Changed: 1  Warnings: 1

Warning (Code 1681): 'PASSWORD' is deprecated and will be removed in a future release.
root@localhost : mysql 04:45:48> flush privileges;

show create table mysql.user;  查看建表语句